Only knowing what you've told us in your post, I'd agree with CC1 and Tstew. Given the feelings and hindrances you have with attending church with your Dad, it seems like you'd be happier and more effectively involved with another body of believers. You feeling comfortable being plugged into ministry and being effective in God's will is what's most important 1399.
I agree with your misgivings on the "healing offerings". I could go several different directions with that type of thing, but the most important thing is giving isn't a prerequisite for obtaining healing according to scriptures. Obedience was many times, but to my recollection none of those cases involved monetary obedience. That's completely shakey ground to me.
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In essentials, unity. In non-essentials, liberty. In all things, charity. Augustine